Good reply for Queens pawn opening

This has probably been asked before, but what would be a good opening for black to learn and study to reply to White opening with D4?  

I went for the Queens gambit declined, understanding and learning the myriad of long term plans in the Queens gambit declined is bound to be a monumental improvement to our understanding of chess.

I enjoy the KID. It gives attacking chances for black and is fairly solid.

As a 1. d4 player myself,

Another system you may want to try is the King's Indian if you like attacking chess. In my opinion, it is actually easier to learn than the QGD/Slav/Semi-Slav and can be used on a wide array of openings. But one of the downsides with this system is that white obtains A LOT of space mainly on the queenside and white also has quite a few options against it, the most common is the Classical.

Also, if you like the King's Indian, you may even want to look into the Leningrad Dutch. It can potentially save a tempo as you won't have to move the Nf6 knight to get in f5 like you do in the KID.  Its not played much at master lv but at our lv it can be a devastating attacking weapon-(especially if white doesn't fianchetto the king's bishop, something that may occur especially if your opponents have never seen this before) as you may surprise quite a few opponents with 1. d4 f5!. If you choose this system, I would also recommend you to learn the anti-Dutch variations white can choose. Oh, and you can also use the Leningrad setup vs. other non-e4 openings such as 1. c4 or 1.Nf3. The downside with this opening is a weakened kingside but with correct play, you should be fine.

Hope this helped :] And remember that once you have found a nice opening you like vs. 1. d4, you can always go back to learn the QGD. The important thing is to pick an opening which fits your playing style first.

i would recommend the qeens indian defence. attack then occupy(e4) if white exchanges the knight (f-pawn takes) chases away the kingside knight off (F3) opens the f-file for your rook . opens the kingside for the black qeen! while at the same time allows you too fight for your share of the center. i love the "QGD it is my main weapon with white! i have a  defence for the "queen" i save for tournament play.

the grunfeld is an excellent defence. i find it impossible to play, because im far too tactical of a player for any of that girly hypermodern stuff (haha) but ive seen some players make a joke out of white with it

I usually play the King's Indian but sometimes transpose to the Gruenfeld.

Play the slav defense (standard one, that mostly puts "bad bishop" outside pawn chain making it a good bishop). White player will moan because it is super solid. Imo it is easier to play then KID types of defenses because timing of- and deciding on moves comes more natural in the slav defense. Something that is even harder to play is Leningrad Dutch. I'd keep away from that. One bad step and you can resign.

2 cents from someone that has tried all 3.

There are quite a few opening repertoire books.  One will push the Slav.  Another the Semi-Slav.  Another the Nimzo-Queen's indian complex.  Only one defense has been recommended by several books--the Tartakower variation of the Queen's Gambit Declined.  A very solid line that has been played by Fischer and  Spassky among others.

Point being?

''Two knights tango'' or Mexican defence is interesting...Silman wrote an article about it not so long ago.

I recommend the Nimzo-Indian / Queen's Indian.

Study first the reply 1... d5 because understanding it forms the basis for understanding 1. d4.

Just because someone says something about QGD doesn't mean that they think that is the only opening, or that they don't prepare against other openings.

Give the benoni a try, a lot of players of white will just freak out and go crazy attacking despite black's position being fairly solid, allowing you to pick up the pieces and beat him when his attack fails. Try to learn transpositions to it as well, you can have a lot of fun that way.

I like the black knights tango, but you have to be ready for the Nc3 response, making the game transpose into many other more well known possibilities.

I pull out almost anything, the ones I do mostly are the Benoni, Modern, QGD, QGA.

I try to be unpredictable yet sound.

QGD is a fantastic opening for understanding chess, tarkower and tararsch defenses are also very rich. The problem I find with the very asymmetrical openings like Benoni and KID is they require intense study and even then you are left scratching your head.